Watchman&#39;s time-detector.



PATENTED JUNE 25, 1907.

G. B. PBSSENDEN. WATCHMANS TIME DETECTOR.

APPLIoATIoN FILED sBPT.27,19o5.

wi tu @ons NITED STATES PATENT OFFICE.l

GEORGE B. FESSENDEN, OF ALLSTON, MASSACHUSETTS, ASSIGNOR TO ECO MAGNETOCLOCK COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORA- TION OF MAINE.

Specification of Letters Patent.

Patented June 25, 1907.

Application led September 27, 1905. Serial No. 280,383.

.T @ZZ whom it may concern:

Be it known that I, GEORGE B. FEssEN- DEN, of Allston, in the county ofSuffolk and State of Massachusetts, have invented certain new and usefulImprovements in Vatchmens Time-Detectors, of which the following is aspecification.

This invention relates to portable clocks, or watches, for watchmens useof that type which makes a punched record such as is disclosed inLetters-Patent N o. 156,532, granted November 3, 187 4 to J. E. Buerk.

One of the objects of the invention is to provide a device of thecharacter described which can be actuated only by a key made for aproprietary lock, 'Which will prevent others from using it.

Another object is to provide a device of this character having means forpositively retracting the recording punch or marker.

Another object is to provide such a device .having the barrel of thelock in a space between two arms of the punching member, or marker, soas to render it impossible to operate a marker by any means or operationother than the use of a proper key. A device operating upon thisprinciple possesses the advantage that the key must be turned back inorder to bring the marker back into normal position, the said markerbeing restored without spring action.

In carrying out the invention, I employ a lock and key of the"paracentricI type, although I do not limit myself to this specificform. By employing a lock and key of the HYale type, a watchman, even ifhe were able to secure ablank, would find it impossible to cut thelongitudinal grooves in the blank without the special machinery whichthe manufacturers employ 5 and the slightest difference in the groove,or a bur resulting from the use of a file would make it impossible toturn the lock. In the detector, as shown in the accompanying drawings,there is no spring to get out of order, and the motion of restoring themarkers is positive. The turning of the key allows the marker to punchthe paper dial, and the turning back of the key restores the marker toits proper position. The key can not be removed from the lock until themarker is in its normal position, resulting in bringing the needles orthe markers firmly back to place.

Of the accompanying drawings,-Figure 1 is a plan view of a deviceembodying my invention, part of the cover, or backing, being brokenaway. Fig. 2 is a fragmentary plan, the paper dial and guide, or holder,being removed. Fig. 3 represents an elevation from the left of Fig. 1.Fig. 4 represents a section on line 4 4 of Fig. 1. Fig. 5 is a view,similar to a part of Fig. 4, 'with the key turned to raise a marker.Fig. 6 represents a section on line 6 6 of Fig. 4. Fig. 7 is a view,similar to Fig. 6, showing one of the markers raised by the action of akey. Fig. 8 is a view showing a plurality or set of keys which are usedfor actuating the lock and the markers or recorders. I

Similar reference characters indicate the same or similar partsthroughout the views.

The case 10, having a cover or back 11 hinged thereto, as at 12,contains the casing 13 of a watch or clock movement. These parts are, ormay be, of any well-known or preferred type, it being 'understood thatthe watch or clock dial, (not shown) is at the opposite face of the casefrom the cover 11. Mounted on the winding stem 14 is a holder 15 adaptedto engage the center of the usual paper dial 16, which dial is printedor marked in the usual way for devices of this character.

The barrel of the lock is represented at 17. I have not attempted toillustrate the tumbler mechanism, but it is to be understood that theusual divided pin tumblers are employed, which will prevent the rotationof the barrel 17, excepting when the proper key is inserted to its fullextent. As indicated in Fig. 8, the key has longitudinal grooves in itssides, which result in the key having a cross-sectional shape that willprevent any but the properly shaped key being inserted in the key-hole,the shape of the latter being indicated in Fig. 3. This form of key andlock is well-known, and need not be described further.

Suitably secured in the casing 10, at one side of the watch movementcasing 13, is the frame 1S for the markers, or recorders. Said frame 18and its base 19 are secured in the casing in any suitable way, as byrivets,

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bolts, or screws. A pin 20 extends across the 'frame` 18 and serves asthe pivot Jfor the markers or recorders 21. Each marker has an upper arm21a and a lower arm 2lb, and is provided with a needle, or perforatingpoint 22, which is adapted to punch the paper dial in the manner thatwill be presentlyT described. Above the frame 18 is a top plate 23,'formed with a slot 24. A guide or holder 25 is secured to the top plateby a screw 26, and extends over the slot 241, the end of said guide, orholder, serving also as an indicator. The paper dial is rotated by theclock mechanism, and extends between the plate 23 and the guide orholder 25, the latter being serrated or 'formed with notches ordepressions in line with the needles 22 of the markers, so that thepaper will be held by the ribs of the holder between the recess while aneedle is pressing against the paper and punching through it.

The barrel 17 of the lock is formed with a forward extension 27 saidextension being cut away on one side and of a length to equal the widthof the frame 18. Secured to said cutaway part is a plate or 'llatprojection 28 adapted to bear upon the arm 21b of any marker that hasbeen raised so as to throw said marker positively down when the barrelis turned Afrom the position shown in Fig. 7 to the position shown inFig. 6. To limit the oscillatory movement oi the barrel 17 and itsextension, so that the plate 28 will not move far enough to engage anarm 21a of a marker, I employ a suitable stop or abutment, such as ascrew 29 mounted in one wall of the frame 18, and having its endprojecting into the circular orifice formed to permit of the turning ofthe barrel 17 and extension 27, the end of the screw projecting so thatone surface or the other of the cutaway part will engage the end of thescrew, as clearly indicated in Figs. 6 and 7.

The paracentric key 30 is formed with the usual serrated edge portion 31to engage the usual divided tumbler pins so that their abutting portionsmay be brought into alinement, in the usual manner, to permit the barrelto be rotated by the key. The back of' the key is cut away so as to forma projection 32, leaving an end lug or projection 33. Of course, theposition oi the ward 32, lengthwise of the recess from which is rises,will vary in different keys. The total width of the recess 'formed inthe back of the key will equal the space between the two walls or platesforming the frame 18, so that when the parts are assembled as indicatedin Fig. 5, the arms 212L of all of the markers 21 will just iill up thesaid recess when the key is turned. One marker, however, as the key isturned, will be raised by the ward 32 of the key employed. When the keyhas been turned to the position shown in Fig. 5, it can not be withdrawnbecause the end lug, or projection, 33 willbe inside of the innermostmarker. This end lug is not an absolute necessity, however, because theusual tumblers of the lock will prevent the key from being withdrawn,excepting when in the position shown in Figs. 3 and 6. Of course, thenumber of keys may bc greatly varied. If there areI ten markers, therecan be ten keys, each having but one projection 32, but this number canbe greatly increased by adding other keys with two or more projectionsdii'lerently spaced.

As is usual with such devices, the clock case is provided with afreshpaper dial, and is locked up and then the watchman carries it with himto the diiiierent stations at each of which one key is secured by theusual chain, or other means, so that it can not be carried away, and sothat the watchman must carry the clock successively to the di'l'l'erentkeys at the dii'lerent stations so as to use the key properly to actuatethe markers. This method of use is well-known, and requires no furtherdescription.

It will be seen that by providing a structure in which the markers, orindicators,

must all be positively retracted to normal' position by the operation ofthe key, it is impossible to take thev clock away from the station untilthe key at that particular station has been properly turned back andwithdrawn, and as long as there is no key in the lock, the markers, orindicators, are absolutely and iirmly locked against any sort ofoperation. This is because the plate or projection 28 holds all of theindicators down, and said plate 28 is carried by the lock barrel whichcan only be turned by the proper key, or keys, successively; and as keysto operate the lock can only be obtained from the manufacturers, anagreement with such manufacturers as to the 'furnishing of such locksand keys will absolutely guard against anypossibility-oi tampering withthe device, or improperly operating it.

Having now described my invention, I claim 1. The combination with awatchmans time detector having a plurality of markers or recorders and arotatable barrel having tumbler pins, of a plurality 0r set of keys, allof the keys being similarly irregular in cross section from end to endand having similar edge serrations to actuate said tumbler pins, andeach key having an edge projection beyond the said serrations to actuatea marker or recorder, the projection of each key d iiilering from thator all of the other keys of the set in distance 'from the serrations.

2. A watchmans time detector comprising in its construction a pluralityof markers or recorders, each having two arms,a barrel extending throughthe space between the arms of the markers, means for normally lockingIOO IIO

said barrel against rotation, and means whereby the turning of thebarrel in one direction will positively retract the markers.

3, A device of the character described comprising a plurality of pivotedmarkers or recorders, a barrel having an extension to engage saidmarkers, means for normally lock ing said barrel against rotation, saideXtension being constructed to the depress the markers.

4. A device of the character described comprising a plurality of pivotedmarkers, each having two arms, a barrel having an extension projectingthrough the space between the arms of the markers, means for normallylocking said barrel against rotation, means carried by said extension'for positively depressing the markers, and a stop 'for limiting therotation ol' the barrel.

5. A device of the character described comprising in its construction aplurality of recessed pivoted markers, a lock barrel having acylindrical portion and formed with an extension which is cut away, saidextension being located in the recesses of the markers, a plate securedto the cutaway portion ofthe lock barrel and projecting radiallytherefrom,

said plate being adapted to engage one side of the recesses of themarkers to depress them, and a stop to limit rotation ofthe barrel.

6. In a watchmans time detector, the combination with a barrel having aneXtension, of a plurality of pivoted recorders actuated by saidextension, and a key adapted to ht said barrel and project beyond thesame, said key having a serrated edge portion to engage tumblers in saidbarrel and.

having another edge portion provided with a recorder-actuatingprojection.

7. lin a watchmans time detector, the combination with a plurality ofmarkers or recorders, of a barrel having an extension to actuate saidmarkers or recorders, said barrel having a slot for a key, and a keyhaving one edge portion lformed to actuatev lock tumblers in said barreland another edge portion to actuate one of the recorders.

In testimony whereof I have aliixed my signature, in presence of twowitnesses.

A GEORGE B. FESSENDEN. l/Vitnesses:

A. W. HARRISON,

C. F. BROWN.

